php - 从 php 传递到 AJAX

Question

是否可以将两个变量从 PHP 传递到 AJAX 并单独使用它们:

获取这个:

echo $row['route'] + $row['Distance'] ;

然后我可以:

$.getJSON("DisplayIndividualMySQLi.php", function(data) { 
    // alert(route);
    // alert(distance);
     }

Answer 1

当您使用 getJSON 从 php 获取数据时，来自 php 的响应需要采用 json

http://php.net/manual/en/function.json-encode.php

<小时/>

PHP

// DB Query to set $row[ 'route' ] and $row[ 'Distance' ]
$sql = "SELECT route, Distance, UserID, RandomField, Etc FROM foo where bar = 'baz' LIMIT 1";
$row = $db->query( $sql )->fetch_assoc();
//...

$array = array( 
    'route' => $row[ 'route' ],
    'distance' => $row[ 'Distance' ],
    'UserID' => $row[ 'UserID' ]
);
// returns { "route": "foo", "Distance": "bar", "UserID": "User" }
echo json_encode( $array );

<小时/>

JS

// Case is important on things in the data object!
$.getJSON( "DisplayIndividualMySQLi.php", function( data ) {
   console.log( data ); // Object
   console.log( data.route ); // shows php's $row[ 'route' ]
   console.log( data.Distance ); // shows php's $row[ 'Distance' ]
} );